US1508509A - Method of masking photographic film while exposure is being made - Google Patents

Method of masking photographic film while exposure is being made Download PDF

Info

Publication number
US1508509A
US1508509A US575310A US57531022A US1508509A US 1508509 A US1508509 A US 1508509A US 575310 A US575310 A US 575310A US 57531022 A US57531022 A US 57531022A US 1508509 A US1508509 A US 1508509A
Authority
US
United States
Prior art keywords
film
exposure
opaque member
opaque
positive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US575310A
Inventor
Leon F Douglass
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US575310A priority Critical patent/US1508509A/en
Priority to US612242A priority patent/US1543065A/en
Application granted granted Critical
Publication of US1508509A publication Critical patent/US1508509A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00Photographic printing apparatus
    • G03B27/02Exposure apparatus for contact printing
    • G03B27/14Details
    • G03B27/28Edge-masking devices

Definitions

  • Fig. 1 is an. eevation-view showing the clear glass together with an opaque member attached thereto;
  • Fig. 2 is a similar view of the clear glass together with another opaque member of different shape attached thereto;
  • Fig. 3 is a diagrammatic fragment of a photographicfilm upon which are produced two images from two separate negatives by means of the clear glass and the opaque members shown in Figs. 1 and 2;
  • Fig. 4 is a sectional view of a portion of a prmting machine, showing the relative arrangement of the negative and positive photographic films, the clear glass and an opaque member attached thereto.
  • A is a rectangular piece of clear glass or a transparent celluloid which is so proportioned that it fits within a printing machine and covers one frame of the film or the entire surface of a plate.
  • B and B are opaque members, consisting of pieces of black cloth or other suitable materials which will not permit light rays to pass through them.
  • B and B are attached to A by means of glue or any other suitable adhesive, and are placed thereon in such a manner that the portion of the film upon which no exposure is to be made, is covered thereby.
  • Figure 4 shows in section, a portion of a printing machine, in which the clear glass A, together with the opaque member B, are placed in printing position between the printing light L, and the ne tive film F. Behind the negative film?
  • the positive film F upon whichthe titles. or a plurality of different sceneqor images are to be produced.
  • the o aque members B and B. are so formed or shaped that one exactly fits within the other, as shown in Figs. 1 and 2.
  • a portion of the positive film F and one oft e negatives will be covered by one of the opaque members, while in making a second exposure the positive film F and the other negative will be covered in such a manner by the other of the opaque members that the portions thereof which were not exposed by the previous exposure, will be subjected to the light rays from light L.
  • the opaque member B Wlll be removed from clear glass A and the other opaque member B will be placed thereon in such a position, that it will cover its surface except for the part thereof previously covered by opaque member B.
  • the positive film F 'isexposedto light rays from light L except for the part thereof which is covered by opaque member B while in the second exposure, the part thereof covered by opaque member B is not exposed, and the part previously covered by B is exposed.
  • one particular negative is employed so as to produceon the pos: itive film F the scene appearing thereon, while in the second exposure a different negative is employed so as to produce a different scene thereon.
  • a scene showing t e interior 0 a theatre in which a motion picture is being displayed a scene showing t e interior 0 a theatre in which a motion picture is being displayed.
  • the positive film F and a ne ative, upon which appears the interior of a t eatre scene, are inserted in the proper printing position ivithin a printing machine.
  • Opaque member B is attached to clear lass A, and placed thereon in such a positlon that the light rays from light L are not permitted to strike the" part of the positive upon which the motion picture screen is to appear.
  • the clear glass A and the opaqge member B are inserted in the printer, tween light L and the negative F. Then by exposure, the interior of the theatre is produced on positive film F, with an unexposed portion appearing thereon which 1s to vvbe exposedon a second operation of the.
  • a second negative is selected, upon which ap pearsany particularimage or scene, and it,
  • the opaque member B is removed from clear glass A, and the other opaque member B is attached thereto, care being taken to placeit in a position which will'exactly cover that portion of positive film F previously exposed, and still leave an openlng covered orig nally by B.
  • the clear glass A previously covered by B, thereby producing a scene from the negative, on the part of the positive film where the motion picture screen is to appear.
  • clear glass is to be construed as applying to both-transparent celludoid and glass, and opaque members is'to be construed as applying to any substance or materialwhich will not permit light rays topass through it.
  • an opaque member of particular shape to atransparent support adapted to cover one frame'of the positivefilm, placing the opaque member and transparent support in the pathof the light rays from a printing light, making a print ifnoin a selected negative film upon thepositive film by means of the light rays passing through the transparent support and the selected negative film, removing the opaque member from the transparent support, and attaching thereto another opaquemember adapted to mask the portion of the transparent, sup

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)

Description

Sept. 16 1924.
L. F. DOUGLASS mmaon OF msxme PHOTOGRAPHIC FILM WHILE sxrosum: 1s BEING MADE Filed July 15, 1922 Patented Sept. 16, 19724.
U IT D STATES 1,508,509 PATENT OFFICE.
LEON I. DQUGLASS, OF IENLO BARK, CALIFORNIA.
METHOD OF IASKJIIYG BKQTOGBAPHIC' FILI WHILE EXPOSURE IS BEING MADE.
Application filed July 15, 1922. Serial No. 575,310.
Tooll whom it may concern:
Be it known that'I, LEON F. DOUGLASS, a citizen of the United States,and a resident of Menlo Park, in'the county of San Mateo and State of'California,-have invented new and useful Improvements in the Methods of,
a convenient method for producing a plurality of separate scenes or images from separate negative films on. a single positive film.
The invention is illustrated in the accompanying drawin s in which:
Fig. 1 is an. eevation-view showing the clear glass together with an opaque member attached thereto;
Fig. 2 is a similar view of the clear glass together with another opaque member of different shape attached thereto;
Fig. 3 is a diagrammatic fragment of a photographicfilm upon which are produced two images from two separate negatives by means of the clear glass and the opaque members shown in Figs. 1 and 2;
Fig. 4 is a sectional view of a portion of a prmting machine, showing the relative arrangement of the negative and positive photographic films, the clear glass and an opaque member attached thereto.
In the drawings, A, is a rectangular piece of clear glass or a transparent celluloid which is so proportioned that it fits within a printing machine and covers one frame of the film or the entire surface of a plate. B and B are opaque members, consisting of pieces of black cloth or other suitable materials which will not permit light rays to pass through them. B and B are attached to A by means of glue or any other suitable adhesive, and are placed thereon in such a manner that the portion of the film upon which no exposure is to be made, is covered thereby. Figure 4, shows in section, a portion of a printing machine, in which the clear glass A, together with the opaque member B, are placed in printing position between the printing light L, and the ne tive film F. Behind the negative film? is placed the positive film F, upon whichthe titles. or a plurality of different sceneqor images are to be produced. When two separate scenes or images are to be produced on a positive film, the o aque members B and B. are so formed or shaped that one exactly fits within the other, as shown in Figs. 1 and 2. Thus when exposure is being made to light L in a print ng machine, a portion of the positive film F and one oft e negatives will be covered by one of the opaque members, while in making a second exposure the positive film F and the other negative will be covered in such a manner by the other of the opaque members that the portions thereof which were not exposed by the previous exposure, will be subjected to the light rays from light L. Before exposing the positive film to the light rays from light L a second time, the opaque member B Wlll be removed from clear glass A and the other opaque member B will be placed thereon in such a position, that it will cover its surface except for the part thereof previously covered by opaque member B. Thus, by the first exposure the positive film F 'isexposedto light rays from light L except for the part thereof which is covered by opaque member B, while in the second exposure, the part thereof covered by opaque member B is not exposed, and the part previously covered by B is exposed. In the first exposure one particular negative is employed so as to produceon the pos: itive film F the scene appearing thereon, while in the second exposure a different negative is employed so as to produce a different scene thereon. Thus for instance, suppose it is desired to roduce on a ositive film, a scene showing t e interior 0 a theatre in which a motion picture is being displayed. The positive film F and a ne ative, upon which appears the interior of a t eatre scene, are inserted in the proper printing position ivithin a printing machine. Opaque member B is attached to clear lass A, and placed thereon in such a positlon that the light rays from light L are not permitted to strike the" part of the positive upon which the motion picture screen is to appear. The clear glass A and the opaqge member B are inserted in the printer, tween light L and the negative F. Then by exposure, the interior of the theatre is produced on positive film F, with an unexposed portion appearing thereon which 1s to vvbe exposedon a second operation of the.
printing machine. After the first exposure, a second negative is selected, upon which ap pearsany particularimage or scene, and it,
together with the positive film F are insert ed within the printing machine, as before. The opaque member B is removed from clear glass A, and the other opaque member B is attached thereto, care being taken to placeit in a position which will'exactly cover that portion of positive film F previously exposed, and still leave an openlng covered orig nally by B. The clear glass A previously covered by B, thereby producing a scene from the negative, on the part of the positive film where the motion picture screen is to appear. Thus by two exposures and by the use of the clear glass A, together with the opaque members and B, two separate scenes are produced on' a single I positive film.
It is to be understood thatI am not limited to any particular kind of clear glass for the attachment of the opaque members, as the same satisfactory results can be ac' complished by using a transparent celluloid,
upon which can be photographed the opaque members. Therefore the term clear glass is to be construed as applying to both-transparent celludoid and glass, and opaque members is'to be construed as applying to any substance or materialwhich will not permit light rays topass through it.
It is to be expressly understood that I am not limited to: any particular kind or form of photography, as it is apparent that my invention maybe used in. connection with both still motion photography or cinematography.'
Havingdes'cribed my invention, What I'ec'laim is: u f y 1. The method of producing two separate.
images on a positive film which comprises,
attaching an opaque member of particular shape to atransparent support adapted to cover one frame'of the positivefilm, placing the opaque member and transparent support in the pathof the light rays from a printing light, making a print ifnoin a selected negative film upon thepositive film by means of the light rays passing through the transparent support and the selected negative film, removing the opaque member from the transparent support, and attaching thereto another opaquemember adapted to mask the portion of the transparent, sup
port not masked by the first mentioned opaque member, interposing the last men- 'tionedopaque member and transparent support in the path of the light rays proceeding froma printing light through another selected negative film to the positive film, and making an exposure of said positive film to the light rays passing through the transparent support and, the second selected nega tive film.) v
2. The method of producing two separate scenes on a positive film whichcomprises,
firstly masking portions of a positive film by means of an opaque member of particular shape supported by a transparent member and exposing the unmasked portions of the positive filmto the light rays passing through the transparent member and a selected negative film, and secondly, masking the portions of the positive film previously exposed, by means of an opaque member of another particular shape supported by the transparent member, and exposing the pos1 tive film to the light rays passing through the transparent memberand a second selected negative film; v 3. Themethod of producing ,twoseparate images on' apositive film which comprises inserting an opaque member of vparticular shape supported by a transparentmember within .a. printing machine, exposing the positive ,to'the light rays proceeding through thetransparent support and a selected negative film, substituting for the first entioned opaque member another opaque member-adaptedto cover the portion of the transparentsupportnot covered by the first opaque member, inserting the transparent support and the opaque member within the prlnting machine, and exposing the portions of the positive film not previously exposed to the lighti rays proceeding through the transparent support and a second selected
US575310A 1922-07-15 1922-07-15 Method of masking photographic film while exposure is being made Expired - Lifetime US1508509A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US575310A US1508509A (en) 1922-07-15 1922-07-15 Method of masking photographic film while exposure is being made
US612242A US1543065A (en) 1922-07-15 1923-01-12 Method of masking photographic film while exposure is being made

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US575310A US1508509A (en) 1922-07-15 1922-07-15 Method of masking photographic film while exposure is being made

Publications (1)

Publication Number Publication Date
US1508509A true US1508509A (en) 1924-09-16

Family

ID=24299787

Family Applications (1)

Application Number Title Priority Date Filing Date
US575310A Expired - Lifetime US1508509A (en) 1922-07-15 1922-07-15 Method of masking photographic film while exposure is being made

Country Status (1)

Country Link
US (1) US1508509A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3155978A (en) * 1960-08-08 1964-11-03 John F Seitz Method of making motion pictures
US4183663A (en) * 1978-09-05 1980-01-15 Greenly Robert B Process for making multicolored photographic slides and apparatus therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3155978A (en) * 1960-08-08 1964-11-03 John F Seitz Method of making motion pictures
US4183663A (en) * 1978-09-05 1980-01-15 Greenly Robert B Process for making multicolored photographic slides and apparatus therefor

Similar Documents

Publication Publication Date Title
US3613539A (en) Integral photography
US4053910A (en) Multiple exposure optical recording apparatus
US1543065A (en) Method of masking photographic film while exposure is being made
US1508509A (en) Method of masking photographic film while exposure is being made
US2652326A (en) Art of making stereoscopic pictures
US1860737A (en) Double exposure process
US2609294A (en) Cinematographic matte
US1841274A (en) Preparation of photogravure copy and the like
US3804622A (en) Methods of producing halftone positive films
US2181405A (en) Method of making animated motion pictures
US2661290A (en) Method of stripping multilayer negatives
US1541555A (en) Making photographs for mapping and other purposes
US2102021A (en) Photographic half-tone screen material and process
US1869819A (en) Method of forming composite motion picture films
US2785976A (en) Laminated copy unit for stereoscopic pictures
US2133085A (en) Transition of scenes on a motion picture film
US1825598A (en) Process for producing combined sound and picture films
US1909282A (en) Method of producing diapositives in the production of printing forms
US1978559A (en) Process of making printing surfaces
US2754208A (en) Production of screened photographic images
US1260324A (en) Making multiple photograph exposures.
US1576854A (en) Method of making motion-picture films
US1613163A (en) Method of producing composite photographs
US1874529A (en) Printing pictures of a lenticular film
US1503731A (en) Process for producing multiply-exposed motion-picture films